Self-locking window-lock.



T. L. THOMAS & W. D. LEWIS. SELF LOOKING WINDOW LOCK.

APPLICATION FILED 00T.22,1908.

9 1 9,653 Patented Apr. 27, 1909.

avumnlozl THE mamas rzrzns c0., WASHINGTON. n. cy

411 to one of the frames of a window, preferably UNITED STATES PATENTOFFICE.

THOMAS L. THOMAS AND WILLIAM D. LEWIS, OF PLYMOUTH, PENNSYLVANIA.

SELF-LOCKING WINDOW-LOCK.

Application filed October 22 To all whom it may concem:

Be it known that we, THOMAS L. THOMAS and WILLIAM D. LEwIs, citizens ofthe United States, residing at Plymouth, in the county' of Luzerne andState of Pennsylvania, have invented certain new and useful Improvementsin Self-Locking Window-Locks; and do hereby declare the following to bea full, clear, and exact description of the invention, such as willenable others skilled in th'art to whichit appertains to make and usethe same.

This invention relates to improvements in looks, and particularly towindow locks of the self-closing or looking variety, and has for anobject the construction of a lock that is strong and durable and onethat will automatically lock itself when the window is closed to whichit is secured.

Another object of the invention is the arrangement of a window lock inwhich the housing of the moving part of the lock overhangs a shortdistance one of the window frames so as to positively prevent anyinstrument being inserted between the two frames of the window formoving the movable art of the lock.

With these and other objects in view the invention comprises certainnovel constructions, combinations and arrangement of parts as will behereinafter more fully described and claimed.

In the accompanying drawings: Figure 1 is a front view of a lock shownapplied to a Window. Fig. 2 is a section through Fig. 1 approximately online 2-2. Fig. 3 is a sectlon through Fig. 2 approximately on line 33.

In constructing the lock the same is provided with a housing adaptedto-be secured the lower frame, and in this housing is arranged areciprocating bar formed with a slot through which a hook secured to theupper window frame is adapted to pass. After the hook has passed throughthe slot in the reci rocating bar the reciprocating bar is forced ack bya suitable spring so as to positively hold the frame from movement, andin this way the upper window frame is prevented from being moveddownward and the lower window frame is prevented from being movedupward. When it is desired to unlock the window for raising the lowerframe or lowering the upper frame, all that is necessary is to pressupon the reciprocating bar which is formed with a button or head forSpecification of Letters Patent.

Patented April 27, 1909.

, 1908. Serial No. 459,100.

that purpose, and the same is forced longitudinally and releases thehook after which either of the frame may be moved. After either of theframes have been moved a short distance the same may be moved up anddown as desired as long as both frames are not brought to a closedposition which would cause the hook to pass through the slot in thereciprocating bar and become locked against the same.

In order to more clearly set forth an embodiment of the invention wehave shown in the accompanying drawings a preferred form in which 1indicates a housing constructed of any desired metal that is formed witha bent over edge 2 which permits the housing to project beyond the lowerwindow frame 3 but does not leave any opening for the admission of aknife or other instrument from the outside into the housing, that is anyinstrument can not be forced between window frame 3 and window frame 4into the housing 1. In housing 1 is mounted a reci rocating locking bar5 that is formed with a s 0t 6 which is beveled at 7 for permitting afree entrance of a hook shaped member 8. The hook 8 is riveted orotherwise securely fastened to a plate 9 that may be countersunk onframe 4 or placed on top thereof and secured in place by any desiredmeans as screws 10. The housing 1 is also secured in place by anydesired securing means as screws 11. The reciprocating looking bar 5passes entirely through housing 1, but as seen in Fig. 3 one end isreduced at 12 and is formed with a head 13 for affording means by whichthe bar may be reciprocated. Bar 5 also is formed with a notch 14; whichis adapted to receive one end of a spring 15 that engages one of theside walls of housing 1 and also a notch 16 that is formed in thehousing. By the action of spring 15 the locking rod 5 is normally heldso that the shouldered portion 17 is normally in engagement with one ofthe sides of the housing 1, and also causes the end of the locking rod 5to be positioned beneath the over-hanging portion of hook S, as clearlyseen in Fig. 2. The spring 15 holds the locking rod in this positionwhether or not the hook 8 is in the position shown in Fig. 2, ordisengaged. If the frame 3 has been raised above hook S or hook 8 hasbeen lowered beneath frame 1 after having been unlocked the bar 5 willtake the position shown in Fig. 2, and when the respective frames 3 and4 have been brought to a closed position for closing the Window hook '8will enter slot 6 and the beveled face 18 of hook 8 will engage thebeveled face 7 and move the bar 5 longitudinally until hook 8 has takenthe position shown in Fig. 2. portion of hook 8 passingb ar 5, spring 15Wlll move bar 5 to the position shown in Figs Z and 3,;that is untilshoulders 17 are in engagement with one: wall of "the housing 1, and theslotted end of the bar will be in engage ment ith the overhangingportion of hook 8.

By this construction and arrange 'n'eiit a lock is presented that iseasily unlocked; namely, by the pressing in of head 13 for 'disengaginghook S'from locking bar 5, and then the respective frames "of the Windoware adapted to be moved as desired, the pressure on head 13 must bemaintained until hook 8 is disengaged from bar 5... hen it is desired tolockthe 'w'inc'low all that is necessary is to close the same and thelock Will automatically take a locked position.

X'Vhat We claim is: I

In a Window look, a housing adapted to be Immediately upon theover-hanging secured to a Window frame and project over the adjoiningframe; said housing being formed With a turned over edge that preventsaccess to the interior of the housing from between said Window frame anda bent out portion for receiving the end. of a spring, a reciprocatingbar formed with an eye mounted to reciprocate in said housing, a

spring fitted into the bent out portion in said

